$\frac{d}{dx}\left(cos\left(x+y+z\right)\right)$
$3\left(g-4\right)$
$y\:+\:cos\left(x\right)y\:=\:x$
$\left(-4a^3-7b^4\right)^2$
$\frac{-250}{-50}$
$\left|-9\right|+-12$
$y=\left(2x+5\right)^{-\frac{1}{2}}$
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